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authorSteven Rostedt (Red Hat) <rostedt@goodmis.org>2014-02-26 13:37:38 -0500
committerSteven Rostedt <rostedt@goodmis.org>2014-03-03 21:11:05 -0500
commit45ab2813d40d88fc575e753c38478de242d03f88 (patch)
tree1859b05c3be128fd1c0a97c09c2fade4ad91e2e2 /include
parent0414855fdc4a40da05221fc6062cccbc0c30f169 (diff)
downloadlinux-linaro-stable-45ab2813d40d88fc575e753c38478de242d03f88.tar.gz
tracing: Do not add event files for modules that fail tracepoints
If a module fails to add its tracepoints due to module tainting, do not create the module event infrastructure in the debugfs directory. As the events will not work and worse yet, they will silently fail, making the user wonder why the events they enable do not display anything. Having a warning on module load and the events not visible to the users will make the cause of the problem much clearer. Link: http://lkml.kernel.org/r/20140227154923.265882695@goodmis.org Fixes: 6d723736e472 "tracing/events: add support for modules to TRACE_EVENT" Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: stable@vger.kernel.org # 2.6.31+ Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/tracepoint.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index accc497f8d72..7159a0a933df 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -60,6 +60,12 @@ struct tp_module {
unsigned int num_tracepoints;
struct tracepoint * const *tracepoints_ptrs;
};
+bool trace_module_has_bad_taint(struct module *mod);
+#else
+static inline bool trace_module_has_bad_taint(struct module *mod)
+{
+ return false;
+}
#endif /* CONFIG_MODULES */
struct tracepoint_iter {